1N/Alib sigblock,sigrelse,sigsetmask,sigprocmask,sigvec

1N/Atyp sigset_t ast.h signal.h

1N/Amem sigvec.sv_mask signal.h

1N/Acat{

1N/A #ifndef _mem_sigvec_sv_mask

1N/A # undef _lib_sigvec

1N/A #endif

1N/A #ifdef _lib_sigprocmask

1N/A # define sh_sigaction(s,action) do { sigset_t ss;\

1N/A sigemptyset(&ss); \

1N/A if(s) sigaddset(&ss,(s)); \

1N/A sigprocmask(action,&ss,0); \

1N/A }while(0)

1N/A # define sigrelease(s) sh_sigaction(s,SIG_UNBLOCK)

1N/A # define sigblock(s) sh_sigaction(s,SIG_BLOCK)

1N/A # define sig_begin() sh_sigaction(0,SIG_SETMASK)

1N/A #else

1N/A # ifndef _lib_sigblock

1N/A # define sigblock(s)

1N/A # endif

1N/A # ifdef _lib_sigsetmask

1N/A # define sigrelease(s) sigsetmask(0)

1N/A # define sig_begin() sigsetmask(0)

1N/A # else

1N/A # ifdef _lib_sigrelse

1N/A # define sigrelease sigrelse

1N/A # define sig_begin()

1N/A # else

1N/A # define sig_begin() (0)

1N/A # define sigrelease(s) (0)

1N/A # endif /* _lib_sigrelse */

1N/A # endif /* _lib_sigsetmask */

1N/A #endif /* _lib_sigprocmask */

1N/A}end

1N/Atst output{

1N/A #include <signal.h>

1N/A int main()

1N/A {

1N/A #ifdef SIGRTMIN

1N/A printf("#undef _SIGRTMIN\n");

1N/A printf("#define _SIGRTMIN %d\n", SIGRTMIN);

1N/A #endif

1N/A #ifdef SIGRTMAX

1N/A printf("#undef _SIGRTMAX\n");

1N/A printf("#define _SIGRTMAX %d\n", SIGRTMAX);

1N/A #endif

1N/A return 0;

1N/A }

1N/A}end